Clarify SCTP max packet size.

Dear Sirs,

A major equipment vendor (A) states on their documentation that: 
 "The max packet size usable by SCTP is 1416 bytes."

According to RFC2960 and RFC 4960: 
 "An SCTP receiver MUST be able to receive a minimum of 1500 bytes in one SCTP packet.  This means that an SCTP endpoint MUST NOT indicate less than 1500 bytes in its initial a_rwnd sent in the INIT or INIT"

Even if we took the "full" 1500 Ethernet IPv4 packet SCTP will have a max of 1466 bytes. 

I tested and it seems that SCTP packet with longer size is being discarded. Node never acknowledges its reception.

This means that major vendor A is violating the RFC? 
I'm having an IOT issue between two major vendors and I think that vendor A is not following SCTP RFCs (old and new). 

Please confirm.


Thanks in advance and best regards,
Rui Gomes

Source: 
http://tools.ietf.org/html/rfc2960#page-67 6. User Data Transfer paragraph 4, http://tools.ietf.org/html/rfc4960#page-73 6. User Data Transfer paragraph 4)